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Finding the Fourth Proportional to 1,889.26, 2,831.96 and 914.83

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Solution

The fourth proportional to 1,889.26, 2,831.96 and 914.83 is: 1,371.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.26 : 2,831.96 = 914.83 : x
  2. Step 2: Convert to fraction form
    1,889.26/2,831.96 = 914.83/x
  3. Step 3: Cross multiply
    1,889.26x = 2,831.96 × 914.83
  4. Step 4: Simplify right side
    1,889.26x = 2,590,757.17
  5. Step 5: Solve for x
    x = 2,590,757.17/1,889.26
  6. Step 6: Final answer
    x = 1,371.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.